Siemens Water Technologies Pte. Ltd.

Siemens Industry, Inc.

Vulcan Chemical Technologies, Inc.

Gregory D Simpson

Glenn W Holden

A synergistic composition is provided for controlling odor from waste products. The composition comprises a combination of nitrate salt, sulfide-consuming compound, pH-elevating compound, sulfide-oxidizing, nitrate-reducing bacteria, and sulfide-oxidizing enzyme. The method includes adding a sufficient amount of the composition to a waste stream to provide sufficient sulfide-consuming compound to effect immediate removal of sulfide. The composition incorporates a pH elevating compound, which both decreases the amount of gaseous HS and puts the aqueous phase into a pH range where naturally occurring bacteria can more easily metabolize the sulfide. The composition also includes one or more nitrate salts which will accomplish longer term prevention of odors. Specific bacteria are incorporated into the formulation to insure that the nitrate has the right type and amount of bacteria present to prevent formation of and/or consume sulfide. Specific enzymes are incorporated into the formulation to promote oxidation of sulfide.

Composition for odor control

Systems and methods for wastewater odor control

The invention is directed to a process for removing chlorite ion from a body of water containing unacceptably high levels of chlorite comprising adding to said body of water a chlorite removal chemical selected from the group comprising sodium dichloroisocyanurate dihydrate, sodium dichloroisocyanurate, trichloroisocyanurate, polyaluminum chloride, sodium permanganate, potassium permanganate, and catalase enzyme.

Method for chlorite removal

Removing odoriferous sulfides from wastewater

Ascorbic acid or one of its isomers, such as erythorbic acid is added in sufficient quantities to a chlorite-containing solution to rid the solution of chlorite. Sufficient ascorbic acid is added to the chlorite-containing solution to convert the chlorite to chloride. Industrial processes employing this process are disclosed.

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Seabrook, TX, United States of America

Gregory D Simpson